An Australian marriage equality lobby group says about 1000 same-sex couples plan to cross the Tasman to tie the knot in New Zealand.
Legislation allowing same-sex marriage was passed by Parliament in April and comes into effect on Monday.
Australia Marriage Equality chair Alex Greenwich says New Zealand is becoming the wedding destination of choice for gay Australian couples.
He says Australians are heading to New Zealand to get a human right they can't get at home.
Mr Greenwich says the New Zealand legislation has added to pressure on Australian politicians to legalise same-sex marriage.